Hi Pelin,
Yes, both sentences can be used interchangeably.
2021年10月5日
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... I wanted them to.
2021年10月5日
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Hey Pelin! Yeah, you can use these interchangeably. And in my experience in the United States, there's not really one you'll hear more than the other. Personally, I use "since then" at the end of my sentences. Nice job.